Abrading-machine.



E. N. JANSEN.

ABRADING MACHINE.

APPLICATION FILED MAY 10, 1912.

1 ,049,368; Patented Jan.7,1913.

2 SHEETS-SHEET 1.

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% BY far TOKNEY E. N. JANSEN.

ABBADING MACHINE.

APPLICATION FILED MAY 10, 1912.

1,049,368. Patented Jan 7, 1913 2 SHEETS-SHEET 2.

,1 (V NN 3A, a. v I 5-. 6 A g T 3 UNITED STATES P TENT OFFICE,

ELIAS N. JANSEN, OF CLEVELAND, OHIO, ASSIGNOB TO THE JANS-EN-PETEBSON COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

I ABRADING-MACHINE.

Specification of Letters Patent.

Patented Jan. 7,1913.

Application filed Ma! 10, 1912. Serial No. 696,402.

To all whom it may concern:

Be it known that I, ELIAS N. JANSEN, a citizen ofthe United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio,have invented a new and useful Improvement in Abrading-Machines, of which the following is a specification, the principle of the invention bein'g herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

The present invention relates to an abrading machine for use in smoothing or rubbing ofi' various surfaces of material to be used in very accurate work, or for other purposes which render it desirable to have an extremely smooth surface. It has been found extremely difiicult to providesuch a machine, since the action must be even and continuous. In some instances it is desirable to operate upon only a part of the surface, and therefore the machine must be adapted to accomplish this object as well as tovbe able to operate over the whole surface at other times.

To the accomplishment of these and re lated ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following description set forth. in detail certain mechanism embodying the invention, suchdisclosed means constituting, however, but one of the various mechanical forms in which the principle of the invention may be used.

In said annexed drawings :Figure 1 is a perspective view of the present machine; Fig. 2 is a view in perspective of the former member; Fig. 3 is a side view of one of the guides for the carriage; Fig. 4 is a section on the line 4-4 in Fig. 1; Fig. 5 is a top view of the former member; Fig. 6 is a vertical section on the line 66, Fig. 5; Fig. 7 is a plan view of a collar mounted on the plunger; and Fig. 8 is a side elevation of a detail of construction.

In Fig. 1 it will be seen that my machine is provided with a frame comprising two spaced supports 1, upon which are mounted guide members 2 bearing a carriage 3 adapted to receive the material to be operated upon. A cross member 17 and a guide 4 connect the two spaced supports and upon this guidethere is slidably mounted a former 6, which will be described in greater detail hereafter. Rotatably mounted upon each of these supports is a pulley 7 bearing a flexible abrading member 8 which will preferably be an abrasive belt, one loop of which will be substantially parallel with the carriage and slightly above the same.

Upon an upright member 9 mounted upon the cross' member 17 there is pivotally mounted an arm 10, upon one end of which is carried an idle pulley 11 adapted to engage the belt 8, and upon the other end of which there may be. slidab'ly mounted a weight 12. By adjusting this weight at various distances from the center of this arm a varying tension may be put upon the band 8. By thus varying the tension a different amount of slack may be thrown into the lower loop of the belt, thus adapting the same to the varying heights of the work upon the table. The former may be operated by hand, and is adapted to bring the belt into operative engagement with any desired part of the work on the carriage.

The general arrangement and disposition of the parts of my machine have now been described, and the construction of the same in detail will next be taken up.

The spacing between the two supports will, of course, vary in different sizes of machines, but will probably be not less than four to six feet, and since the wheels 13 mounted upon either end of the carriage are beveled (see Fig. 4) in order to retain them upon the rails '14 mounted upon the guides, it will be seen that unless the carriage is moved carefully, it will be liable to bind at one side. To prevent any such difiiculty, I provide two grooved rollers or sheaves 15, which are mounted upon the inside of the two guides and are connected by a shaft 16. A flexible memberdn the form of a cable 19 is mounted upon the lower side of the carriage directly above each of these rollers and engages the same, by passing around the sheave for one turn. Hand wheels 20 connect with one end of the cable and have threaded engagement with the carriage, thus permitting the tension of the course, possible to substitute a chain for the cable and a gear for eachsheave but the present arrangement is simpler and suflicient for the purpose. In this way a very even and free reciprocation of the carriage is secured. The guides 2 may be of any suitable length, but it will be seen that their length 'will dependmore or less upon the work to be done and upon the spacing of the supports.

The construction and purpose of the various pulleys will be obvious from an inspection of the same, and little need be said about any of them, except that one of the pulleys 7 will be connected to a shaft 21 upon which will be mounted other pulleys 22 and 23, which may be connected up with any suitable driving means. .One of these two last-named pulleys will, of course, be an idle pulley, and the other a driving pulley.-

It is desirable to provide a. former which will give a considerable pressure upon the, abrasive belt and yet will operate easily and without requiring any great exertion by the operator. To this end I have designed a former which comprises a body portion 25 having flanges 26 which partially inclose the guide 4. Rollers 27, mounted upon extensions from the body, are adapted to bear against the outer side of the guide and are made ball-bearing in order to sevcure perfect freedom of rotation. The body portion has a square aperture 28 in which there is mounted a hollow plunger 29 nor' mallyheld in the position shown in Fig. 6 by means of a spring 30 pressing against a pin 31 in the upper end of the member 29, and a. pin 32 carried by the body portion 25. The member 29 has a slot 65 on either side, thuspermitting a vertical movement of the member past the'pin 32. The lower end of the member 29 is connected by means of a pin 33 to a bar 35 pivotally connected to an arm 36 which is slotted, and which is adjustably secured to another arm 37 by means of a key 38. The arm 37 is pivotally connected to a. handle 39 which is pivotally mounted about pins 40 held in the body portion 25. By making the two arms 36 and 37 adjustable it is possible to vary the height of the handle 39 to suit the convenience of the operator. Attached to the body portion are small arms or lugs 41 bearing rollers 42; which are ball-bearing and which are adapted to press against the lower end of the member 29 and to prevent any looseness in the movement of the same, although not in any way to bind it. These small arms 41 are pivoted about pins 43 attached to the body portion and may be adjusted by means of screw bolts 44 and nuts 45, to provide for taking up any wear between the body and the plunger 29. Similar rollers are mounted in like manner upon the upper end of the body portion and func-v tion as do the lower rollers. At the lower end of the bar 35 there is removably attached a plate 47 by means of a screw-bolt 48 and nut 49. This plate has an inwardly beveled slot 50 adapted to receive and retain a former or compressing foot 51.. A number of compressor feet of different sizes may be provided and may be attached to' the plate 47 as desired, thus adapting the former to any desired piece of Work. The handle 39 gives about a five to one leverage, and it will be seen that a workman can readily operate the same against the spring 30 by means of this leverage. Other ball-bearing mounted rollers 53 are mounted uponthe body portion, as shown yide a collar 60 which may be adjustably secured on the plunger 29 and which will contact the rollers 42 upon downward movement of the plunger. By securing the collar 60 at various elevations on the collar it is possible to secure any desired length of stroke. The collar is preferably split vertically and has two projecting lugs 61 with registering threaded apertures 62 adapted to be engaged by a screw 63 having a pivoted operating handle 64, as shown in Fig. 7.- By turning thisscrew the collar may be tightened and thus secured at'any desired point on the plunger. The plunger may have graduations 66 marking olfthe inches by sixty-fourths in order to facilitate adjustment of the collar.

The simplicity of construction and ease of operation of my mechanism will be obvious. A single machine is adapted tc a .large number of pieces of work, since the tension on the belt can be varied sullicienlly to permit the same to contact any desired piece of work irrespective of its height above the surface of the carriage, and by means of the interchangeable compressor feet the required width of the piece can be suited. The construction of the former makes it extremely simple to operate and there are no parts which will bind on account of Lhe ball bearing rollers, and by reason of the leverage given to the handle of the compressor foot, the latter may be actuated to engage the under side of the belt with but little effort.

The guides for the carriage will be mounted, not directl but preferably on locks 70 wh ch are threaded to engage feed screws rotatably mounted in the supports in a vertical posi- 5 tion, but not clearly shown in any of the several figures. A horizontally disposed shaft 71 mounted in the supports 1 and the cross member 17 is adapted when rotated by the handle 72 to raise or lower the carriage, since small worm wheels (not shown) are carried by shaft 71 and engage'threaded vertical shafts in the supports. The mechanism for adjusting the elevation of the carriage has not been described or shown 5 in detail since it is similar to the usual means for positioning carriages or work tables.

on the supports 1,

The plate 47 is adapted to automatically adjust itself to conform to slight curvatures 20 coiled spring 73, or a thick rubber washer, is disposed around the bolt 48 between the member 35 and the plate47. This construction permits of of. the former.

fixed in the plate 47 80 ing operated upon.

Other modes of applying the principle of my invention may e employed instead of the one explained, change belng made as regards the'mechanism herein disclosed, pro- 2 vided the means stated by any of the fol-= lowing claims or the equivalent of such;

40 stated means be employed.

tinctly claim as my invent1on:

1. The combination with two spaced supports and guides mounted parallel to each ,45 other on said supports; a carriage havingrollers adapted to engage said guides; other rollers rotatably mounted on said guides; cables mounted on said carriage parallel to said guides, said cables passing around said rollers thussecurely engaging the same; and a shaft connecting said other rollers and correlating rotation of the same, thereby causing said carriage to move evenly along said guides.

- 2. The combination with two spaced supports and guides mounted, parallel to each other on said supports; a carriage having rollers adapted to engage said guides; other rollers rotatably mounted on said guides;

cables mounted on said carriage parallel to said guides, said cables passing around said rollers thus securely engaging the same; means for varying the tension on said cables; and a shaft connecting said other rollers and correlating rotation of the same,

in the work and for this purpose a strip of resilient material, which may be a short a slight lateral adjustmenti Above and below the bolt 48 in the member 35 are horizontally extending slots 74 loosely engaged by pins 75 f parallel to the bolt 48. Thus, some automatic adjustment of the former is possible in either a longitudinal or lateral direction relative to the material be- I i former including a body portion slidably I therefore particularly point out and disadapted to support the material to be opthereby causing said carriage to move evenly along said guides. a

3. In a machine of the character described, the combination with a carriage adapted to support the material to be operated upon, an abrasive belt suitably disposed relatively to said carriage, and means for operating said belt; of a guide member mounted parallel to said carriage; a former; rollers mounted upon the same and adapted to securely engage said guide; and means. adapted to adjust said rollers relatively to said guide to provide for wear.

4. In a machine of the character described, the combination with a carriage adapted to support the material to be operated upon, an abrasive belt suitably disposed relatively to said carriage, and means for operating said belt; of a guide member mounted parallel to said carriage; and a 5 former including a body portion slidably mounted on said, guide, a plunger suitably mounted in said body portion, and means for actuating said plunger to engage the rear face of said abrasive belt.

5. In a machine of the character described, the combination with a carriage adapted to su port the material to be operated upon, a abrasive belt suitably disposed relatively to said carriage, and means for operating said belt; of a guide member mounted parallel to said carriage; and a mounted on said guide, a plunger slidably mounted in said body portion, resilient means normally retainin said plunger in an inoperative position, an means for actuating said plun er to engage the rear face of sald abrasive lt.

6. In a machine of the character described, the combination with a carriage erated upon, an abrasive belt suitably disposed relatively to said carriage, and means for operating said belt; of 'a guide member mounted parallel to said carriage; and a former having an a rtured body portion, said former being slidably'mounted on said guide, including a plunger reciprocably mounted in said apertured body portion, a 1 5 spring engaging said body portion and said plunger and adapted to normally retain said plunger in .an inoperative position, and means for actuatin said plunger to engage the rear face of said abrasive belt.

7. In a machine of the character described, the combihation with a carriage adapted to support the material to be operated upon, an abrasive belt suitablydisposed relatively to said carriage, and means for operating said belt; of a guide member mounted parallel to said carriage; and a former having an apertured'body portion, said former being mounted on said guide,

and including a hollow slotted plunger reciprocably mounted in said apertured body portion, a pin also mounted in said body.

portion and engaging such slot in said. hollow' plunger, a second pin mounted in'said plunger, a coiled spring disposed in said plunger between said two pins, thereby normally retaining said-plunger in aninoperative position, and means adapted to actuate said plunger toengage the rear face of said abrasive belt.

8. In a machine of the character described, the combination with a carriage adapted to support the material to be era-ted upon, an abrasive belt suit-ably d1sposed relatively to said carriage, and means -for operating said belt; of a guide member mounted parallel to said carriage; and a former having an apertured body portion,

' said former being mounted on said guide,

and including a hollow slotted'plunger reciprocably mounted in said apertured body portion, a pin also mounted in said body' portion and'engaging such'slot insaid hollow plunger, a second pin mounted'in said.

plunger, a coiled. sprlng disposed'in said plunger between said two pins thereby nor- .mally retaining said plunger in an inopera tive position, and a handlepivotally attached intermediate its ends to said plunger and attached at one "end to said body portion, whereby operation of said handle actuates said plunger to engage the'rear face of said abrasive belt.

9. In a machine of the haracter ,described, the combination with a carriage adapted to support the material to be operated upon, an abrasive belt suitably disposed relatively to said carriage, and means for operating said belt; of a guide member mounted parallel to said carriage; and a former having an apertur'ed bodyportion, I

said former being mounted on said guide, and including a hollow slotted plunger reciprocably mounted in said apertured body portion, a pin also mounted in'said body portion and engaging such slot in said hollow plunger, a second pin mounted .in said plunger, a coiled spring disposed in said plunger between said two pins thereby normally retaining said plunger in an inoperative position, a handle pivotally attached said former being mounted on said guide, and including a hollow slotted plunger reciprocably mounted in said apertured body portion, a pin also mounted in said body portion and engaging such slot in said hollow plunger, a second pin mounted in said plunger, a coiled s ring disposed in said plunger between sai two pins, thereby. normally retaining said plunger in an inopera-' ,tive' position, a handle pivotally attached at one end to said body portion, two arms, one of the same being pivotally attached to said handle intermediate its ends and the other arm being pivotall attached to said plun-. ger, said two arms eing adjustably connected, whereby the normal position of said handle may be varied as desired.

11. In a machine of the character described, the combination with acarriage adapted to support the material to be operated u on, an abrasive belt suitably disposed re atively to said carriage, and means for operating said belt; of a former including an apertured body portion, a plunger reciprocably mounted in said body portion, and rollers mounted on said body portion and adapted to bear against said plun er, and means adapted to adjust said rol ers relative to said plunger to rovide for wear.

12. In a machine of t e character described, the combination with a carriage adapted to support the material to be operated upon, an abrasive belt suitably --dis-' posed relatively to said carriage, and means for operating said belt; of a former includ-- ing an apertured body portion, a plunger reciprocably mounted in said body portion, means for reciprocating said plunger, and a collar mounted on said plunger and adapted to contact .said body 'portion'during such reciprocation, thereby limiting the stroke.

13. In a machine of the character d'escribed, the combination with a carriage the extent of adapted to support the material to be 017- erated upon, an abrasivebelt suitably disposed relatively to said carriage, and means for operating said belt; of a former including an apertured body portion, a plunger reciprocably moimted in said body portion, means for reciprocating said plunger, and a collar mounted on said plunger, andmeans for detachably clamping the said collar to said plunger, said collar being adapted to contact said body portion during such reciprocation, thereby limiting the extent of the stroke.

' 14. In a machine of the character described, the combination with a carriage 15. In a machine of the character de' scribed, the combination with a carriage adapted to support the material to be operated u on, an abrasive belt suitably disosed re ativdy to said carriage, and means or operatin s aid belt; of a former member mounte adjacent to the rear face of said belt, a former foot secured to said member, and means ermitting automatic adjustment of said oot in a plane transverse to the direction of movementof said belt.

16. In a machine of the character described, the combination with a carriage adapted to support the material to be operated upon, an abrasive belt suitably d1sosed relativelyto said carriage, and means or operating said belt; of a former member mounted ad acent to the rear face of said belt, a former foot secured to said member, and means permitting automatic adjustment of said foot in a plane transverse to the direction of 'movement of said belt, said means including a resilient member interposed between said foot and said former member.

17. In a machine of the character described, the combination with a carriage adapted to support the material to be operated upon, an abrasive belt suitably disosed relatively to said carriage, and means or operating said belt; of a former member mounted ad acent to the rear face of said belt, a former foot secured to said member, means ermitting adjustment of said foot in a p ane transverse to the direction of movement of said belt, and other means permitting adjustment of said former foot in the same plane as the direction of movement of said belt.

18. In a machine of the character described, the combination with a carriage adapted to support osed relatively to said carriage, and means or operatin said belt; of aformer member mounted ad acent t0 the rear face of said belt, a former foot secured to said member, means permitting adjustment of said foot in the same plane as the direction of movement of said belt, said means including slots in said former member and pins mounted on said foot and loosely engaging such slots. Signed by me, this day of April, 1912.

ELIAS N. JANSEN.

*Attested by- HORACE B. GAY, ANNA L. GILL.

the material to be operated upon, an abrasive belt suitably dis- 

